Epson GS ( C pL pH m fn b <Function 3>

CONFIDENTIAL
Paper roll Customize commands GS ( C
Ver. 10.0 1 p. 565
GS ( C pL pH m fn b <Function 3>
[Name] Transmit capacity of the NV user memory currently being used
[Format] ASCII GS ( C pLpHmfnb
Hex 1D 28 43 03 00 00 fn 00
Decimal 294067 300fn0
[Range] ( pL + pH × 256) = 3 ( pL = 3, pH = 0)
m = 0
fn = 3, 51
b = 0
[Description] Transmits the number of bytes of memory used in the NV user memory.
• ESC/POS Handshaking Protocol is not required for this function.
[Notes] ■With this function, the printer sends the “Header to NUL” data shown below:
(*1) The quantity of stored data bytes, plus the key code and terminator, equal the capacity being used.
■The decimal value expressing the capacity being used is converted to ASCII character data and sent from
the most significant digit.
Example: When 120 bytes is used, the number 120 is expressed with three bytes of data
(Hexadecimal: 31H, 32H, and 30H / decimal numbers 49, 50, and 48).
When no memory area is used, the number 0 is expressed with 1 byte of data
(Hexadecimal: 30H / decimal number 48).
■The control information for NV graphics data is included in the capacity in use.
■See previous [Notes for transmission process] for process sending data group.
Send data Hex Decimal Data quantity
Header 37H 55 1 byte
Identifier 28H 40 1 byte
Capacity Used (*1) 30H − 39H 48 − 57 1 − 8 bytes
NUL 00H 0 1 byte